There is no way to know who controls the market, I believe that the level we are today would have to be a joint action in order to have some influence on the flow of btc.
who benefit from cryptocurrency are all of us investors. because business people who use crypto will definitely enjoy the benefits by being given convenience in every trade, so crypto is for anyone and for all who want, so no one group can control the market all will have a share in crypto.
all people that taking part in cryptocurrency ofcourse get benefit from this market.not only investors that spend alot of money, but also bounty hunter and even big company such nvidia that produced vga card.alot of people get benefit direct or undirectly.